org.apache.drill.exec.planner.index.generators

Class NonCoveringIndexPlanGenerator

java.lang.Object

org.apache.drill.exec.planner.physical.SubsetTransformer<org.apache.calcite.rel.RelNode,org.apache.calcite.rel.InvalidRelException>

org.apache.drill.exec.planner.index.generators.AbstractIndexPlanGenerator

org.apache.drill.exec.planner.index.generators.NonCoveringIndexPlanGenerator

public class NonCoveringIndexPlanGenerator
extends AbstractIndexPlanGenerator

Generate a non-covering index plan that is equivalent to the original plan. The non-covering plan consists of a join-back between an index lookup and the primary table. This join-back is performed using a rowkey join. For the primary table, we use a restricted scan that allows doing skip-scan instead of sequential scan. Original Plan: Filter | DBGroupScan New Plan: RowKeyJoin / \ Remainder Filter Exchange | | Restricted Filter (with index columns only) DBGroupScan | IndexGroupScan This plan will be further optimized by the filter pushdown rule of the Index plugin which should push the index column filters into the index scan.

Field Summary

Fields

Modifier and Type	Field and Description
protected FunctionalIndexInfo	functionInfo
protected IndexGroupScan	indexGroupScan

Fields inherited from class org.apache.drill.exec.planner.index.generators.AbstractIndexPlanGenerator

builder, indexCondition, indexContext, origProject, origScan, remainderCondition, settings, upperProject

Constructor Summary

Constructors

Constructor and Description
NonCoveringIndexPlanGenerator(IndexLogicalPlanCallContext indexContext, IndexDescriptor indexDesc, IndexGroupScan indexGroupScan, org.apache.calcite.rex.RexNode indexCondition, org.apache.calcite.rex.RexNode remainderCondition, org.apache.calcite.rex.RexBuilder builder, PlannerSettings settings)

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rel.RelNode	convertChild(org.apache.calcite.rel.RelNode topRel, org.apache.calcite.rel.RelNode input)

Methods inherited from class org.apache.drill.exec.planner.index.generators.AbstractIndexPlanGenerator

checkRowKey, convertRowType, createRangeDistRight, forceConvert, getExchange, getRowKeyIndex, getSortNode, go, newTraitSet, toRemoveSort

Methods inherited from class org.apache.drill.exec.planner.physical.SubsetTransformer

go

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

indexGroupScan

protected final IndexGroupScan indexGroupScan

functionInfo

protected final FunctionalIndexInfo functionInfo

Constructor Detail

NonCoveringIndexPlanGenerator

public NonCoveringIndexPlanGenerator(IndexLogicalPlanCallContext indexContext,
                                     IndexDescriptor indexDesc,
                                     IndexGroupScan indexGroupScan,
                                     org.apache.calcite.rex.RexNode indexCondition,
                                     org.apache.calcite.rex.RexNode remainderCondition,
                                     org.apache.calcite.rex.RexBuilder builder,
                                     PlannerSettings settings)

Method Detail

convertChild

public org.apache.calcite.rel.RelNode convertChild(org.apache.calcite.rel.RelNode topRel,
                                                   org.apache.calcite.rel.RelNode input)
                                            throws org.apache.calcite.rel.InvalidRelException

Specified by:

convertChild in class AbstractIndexPlanGenerator

Throws:

org.apache.calcite.rel.InvalidRelException